Method constructor

packages/service-worker/src/push.ts:176–218

(private sw: NgswCommChannel)

  private subscriptionChanges = new Subject<PushSubscription | null>();

  constructor(private sw: NgswCommChannel) {
    if (!sw.isEnabled) {
      this.messages = NEVER;
      this.notificationClicks = NEVER;
      this.notificationCloses = NEVER;
      this.pushSubscriptionChanges = NEVER;
      this.subscription = NEVER;
      return;
    }

    this.messages = this.sw.eventsOfType<PushEvent>('PUSH').pipe(map((message) => message.data));

    this.notificationClicks = this.sw
      .eventsOfType('NOTIFICATION_CLICK')
      .pipe(map((message: any) => message.data));

    this.notificationCloses = this.sw
      .eventsOfType('NOTIFICATION_CLOSE')
      .pipe(map((message: any) => message.data));

    this.pushSubscriptionChanges = this.sw
      .eventsOfType('PUSH_SUBSCRIPTION_CHANGE')
      .pipe(map((message: any) => message.data));

    this.pushManager = this.sw.registration.pipe(
      map(
        (registration) =>
          (registration as ServiceWorkerRegistration & {pushManager: PushManager}).pushManager,
      ),
    );

    const workerDrivenSubscriptions = this.pushManager.pipe(
      switchMap((pm) => pm.getSubscription()),
    );
    this.subscription = new Observable((subscriber) => {
      const workerDrivenSubscription = workerDrivenSubscriptions.subscribe(subscriber);
      const subscriptionChanges = this.subscriptionChanges.subscribe(subscriber);
      return () => {
        workerDrivenSubscription.unsubscribe();
        subscriptionChanges.unsubscribe();
      };
    });
  }

  /**
   * Subscribes to Web Push Notifications,